Cant delete Excel file

I cant delete a particular file on a network share. This probably seems like a simple fix but I havent been able to delete this file. Here is my analysis:

1. I verified that file is not being used by anyone else. Please see attached bmp.
2. I even tried to take ownership of the file, but not luck. no matter what it still thinks its in use by another person. My only other option is to reboot the server, but this is an enterprise server that thousands of people use, so I cant just arbitrarily reboot it.

This Micro Tutorial will demonstrate how to create pivot charts out of a data set. I also added a drop-down menu which allows to choose from different categories in the data set and the chart will automatically update.